It is a Corydoras species I do believe, but not sure which. It is a "catfish" as I call it. But, it came with the frog. The fish itself is as long as the frog is, and they don't really bother each other. I've watched the two together for hours on end and they never really go after each other. And the funny thing is, when I had dropped some feeder fish in their tank, the catfish would push a few at a time towards the frog. The frog would eat the fish near by and then it started all over again. They were together when I had gotten them. The woman said that they had been together since the catfish was half the size it is now. And the frog never once tried to eat it.

I tried to feed the frog some blood worms... But it was the ones that come in the frozen squares. I don't know if it actually ate some. But I know I saw some feeder fish go after them. I tried feeding it some night crawler chunks and the frog spit them out.

What kind of plants can I put in there with them?

The tank was given to me with the frog and fish, so there for I really can't complain. The whole set up (frog, fish, tank, and filter) were all given for free.